Twilight Render User Forum

Getting the exposure right for an image seen through a window when rendering an interior can make a big difference in how realistic that image will appear.

It is important to keep in mind and to use the Exposure Control in the Camera Tab in the Render Dialog Box.

Consider these real-world photo examples. Notice that if the interior of the room is shot dark, that the exterior viewed through the window is exposed in such a way that the objects outside are understandable:

Notice that if the exposure of the camera is changed so that the room itself can be viewed in good lighting, the exterior becomes quickly overexposed:


In Subject: Master Bedroom
We can see in this great image by revered SketchUp artist and well-respected Twilight Render artist Tomyong that the external exposure doesn't match with what our eyes expect:


An attempt at correcting the exposure in post-pro was some-what successful, but it would be even better if the external exposure were done in the scene setup, eliminating need for much post-pro.


So, to increase the exposure on the exterior image:
Adjust exposure in the "Post-Process: Tone Mapping" area of the Render Dialog while rendering.
Set the background image you have inserted onto a backplate plane inside your SU model and set it to be a Light Emitter material template set to type:"fake" with power starting at 200watts/m2 (may vary depending on the scene and camera/tone map settings)

Example of real photo demonstrating interior vs exterior lighting with photographic exposure.

Disculpa, no entiendo en que parte pongo esos valores, en post-porcess?

Wow. Nice example and info! Thanks!

xjhossefx wrote:Disculpa, no entiendo en que parte pongo esos valores, en post-porcess?

Exposure es en post-process, si.

Set the image inside your SU model and set it to be a fake light emitter starting at 200watts/m2 (may vary depending on the scene)

eso es en "Template Materials",

First insert your background image into SketchUp as an image, then explode it. Then modify the material properities of this background image texture using "Template Materials" dialog from the Twilight Render toolbar.
google mis-translation into Spanish to follow :
Primero insertar su imagen de fondo en SketchUp como una imagen, luego explote él. A continuación, modifique los Properities materiales de este fondo de la imagen de textura mediante diálogo "Materiales de plantilla" de la barra de herramientas de Twilight Render.

aya es para que una imagen fondo se vea medio blanquito con la platilla emisor cierto? XD, yo estaba pensando que los valores que están en las imágenes f2.8 iso 200 se ponía en algún lugar de la cámara

Have you watched the video tutorials?
¿viste los tutoriales en vídeo?

Si eh visto todo los vídeos tutoriales de la pagina : P
If eh seen all the tutorial videos of page : P

I'm sorry, google translate failed to translate your question above. I do not speak spanish, but I can understand a little what is written. In this case, I don't understand the question or questions at all.

As I understand it using Easy 09 is sometimes the best option when rendering an interior scene like the one here. But the Easy 09 option does not allow you to use a Fake Emitter, and using an LEM will add greatly to the render time. Is there another way to achieve this effect when using Easy 09?

With the unbiased settings, Interior and Interior+, light emitting materials don't considerably add to render time. There may be some increase but it's not likely to be much.